KR100548449B1 - Gas leakage prevented scroll compressor - Google Patents

Abstract

The scroll compressor to prevent the leakage of the compressed gas of the present invention is a sealed container in which a certain receiving space is formed on the inside and the oil is stored at the bottom of the receiving space, and the upper and lower portions fixed to the inner and upper portions of the sealed container, It is installed between the lower frame, the upper frame and the lower frame and the electric mechanism portion consisting of a rotor and a stator, a rotary shaft pressed into the center of the rotor and rotated at the same time when the rotor rotates, and coupled to the upper end of the rotary shaft A turning scroll during operation by using a compression mechanism part consisting of a fixed scroll and a swing scroll for compressing a refrigerant, and a compressed gas provided between the upper frame and the swing scroll and formed between the fixed scroll and the swing scroll. Gas that comes into close contact with the wrap end of the turning scroll and the fixed scroll by It includes a rotating scroll floating means to prevent leakage, the rotating scroll is injured by the rotating scroll floating means during operation, and the lap of the rotating scroll and the fixed scroll is rotated in close contact with the contact surface, Compression of the refrigerant gas is performed without leakage, thereby improving the compression efficiency of the compressor.

Description

Scroll compressor prevents leakage of compressed gas {GAS LEAKAGE PREVENTED SCROLL COMPRESSOR}

1 is a longitudinal sectional view showing a structure of a conventional scroll compressor.

Figure 2 is a cross-sectional view showing the operation of the conventional tip chamber.

Figure 3 is a longitudinal sectional view of the scroll compressor to prevent the leakage of compressed gas according to the present invention.

Figure 4 is a cross-sectional view showing a state in which the ring receiving groove is formed in the mainframe in the present invention.

5 is a plan view showing a thrust member of the present invention.

6 is a cross-sectional view taken along the line AA ′ of FIG. 5;

Figure 7 is a partial cross-sectional view showing the state of the rotating scroll floating means when stopped in the scroll compressor of the present invention.

8 is a partial cross-sectional view showing the operation of the swing scroll floating means during operation in the scroll compressor of the present invention.

Explanation of symbols on the main parts of the drawings

101: receiving space 102: oil

103: airtight container 104: upper frame

105: lower frame 106: rotor

107: stator 108: electric mechanism part

109: axis of rotation 110: fixed scroll

110a, 111a: Lap 111: Turning Scroll

112: compressor section 120: swing scroll floating means

121: ring insertion groove 122: intermediate rolling hole

123: thrust ring 124: sealing member

131: body 132: recess groove

133: gas inlet hole 134: connecting groove

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more particularly, to a scroll compressor that prevents the leakage of compressed gas such that the turning scroll rises in the axial direction so as to be in close contact with the entire surface while rotating. .

Conventional scroll compressors used as compressors for air conditioners and refrigerators are illustrated in FIGS. 1 and 2, which will be briefly described as follows.

As shown, the upper frame 2 is fixed to the inner upper portion of the sealed container 1 having an accommodation space therein, and the lower frame 3 is fixed to the lower portion.

In addition, between the upper frame 2 and the lower frame 3, there is a motor mechanism part 6 composed of a stator 4 and a rotor 5 rotatably coupled to the inside of the stator 4. The upper and lower parts of the rotor 5 are provided with a balance weight BW so that the rotational imbalance can be adjusted when the rotor 5 rotates.

In addition, the shaft shaft 5 is formed in the shaft hole 5a formed in the vertical direction in the center of the rotor 5 so that the rotation shaft 7 is press-fitted so as to rotate simultaneously with the rotation of the rotor 5. The upper end of the rotary shaft 7 coupled to 5) is rotatably inserted into the support hole 2a of the upper frame 2, and the lower end is rotatably inserted into the support hole 3a of the lower frame 3. have.

In addition, a fixed scroll 8 fixed to the upper frame 2 on the upper side of the upper frame 2, and a rotating scroll 9 rotatably coupled between the fixed scroll 8 and the upper frame 2; Compressor section 10 is formed of a), the eccentric portion (7a) formed to be eccentric to the upper end of the rotary shaft (7) in the coupling hole (11a) of the boss portion (11) formed at the lower end of the swing scroll (9) ) Is inserted and coupled.

In addition, the lower end of the rotary shaft 7 may suck up the oil 12 at the bottom of the sealed container 1 and supply the oil 12 to the frictional portion of the compression mechanism 10 through the oil passage 7b formed on the rotary shaft 7. The oil feeder 13 is coupled so as to.

In addition, a suction pipe 14 for sucking the refrigerant gas and a discharge pipe 15 for discharging the compressed refrigerant gas are provided on the side surface of the sealed container 1 with a height difference, and the fixed scroll 8 In the upper portion, the low pressure portion 20 in which the refrigerant gas sucked into the sealed container 1 through the suction pipe 14 and the sucked refrigerant gas are compressed in the compression mechanism unit 10 to discharge the discharge pipe 15. The high and low pressure separating plate 16 which partitions the high pressure part 21 which stays before being discharged through is fixed.

In addition, the upper surface of the fixed scroll 8, the valve plate 17 for opening and closing to prevent the back flow of the refrigerant gas discharged through the discharge hole (8a) formed in the fixed scroll 8, and the valve plate 17 The check valve 19 which consists of the valve guide 18 which guides so that it may not be disengaged is combined.

The tip chamber 22 is formed at the end of the wrap 8b of the fixed scroll 8 and at the end of the wrap 9a of the swing scroll 9, so that the lower surface of the fixed scroll 8 of the tip chamber 22 during operation is formed. The tightness of the gas compressed by the close contact is maintained.

In the figure, reference numeral 8c is a refrigerant inlet, 18a is a high pressure gas inlet, 16a is an outlet, 30 is a sliding bush, and P is a compression pocket.

In the scroll compressor configured as described above, when power is applied, the rotor 5 of the power mechanism unit 6 rotates, and the rotation shaft 7 rotates by the rotation of the rotor 5. The swinging scroll 9 coupled to the upper end of the rotating shaft 7 rotates.

The rotation of the pivoting scroll 9 is a pivoting movement with an eccentric distance, which is the distance from the center of the rotational shaft 7 to the center of the eccentric portion 7a, as the turning radius, and the pivoting scroll 9 pivoting as such Rotating is prevented by the sliding bush (30).

When the turning scroll 9 turns as described above, the lap 9a engages with the lap 8b of the fixed scroll 8 to make a turning movement. At this time, the refrigerant gas passes through the suction pipe 14 to the closed container ( 1) flows into the low pressure portion 20, and the introduced refrigerant gas flows through the refrigerant inlet hole 8c formed in the fixed scroll 8 to the wrap 8b of the fixed scroll 8 and the turning scroll 9; It flows into the compression pocket P formed between the wraps 9a, and the volume of the compression pocket P is reduced by the continuous rotation of the rotating scroll 9, thereby compressing the refrigerant gas and moving to the center portion. The compressed refrigerant gas is discharged to the outside through the discharge hole 8a of the fixed scroll 8.

During the compression as described above, the oil 12 stored in the inner lower portion of the sealed container 1 is sucked up by the oil feeder 13 which is rotated with the rotation of the rotary shaft 7, and the oil is sucked up. 12 is supplied to the compression mechanism part 10 through the oil flow path 7b.

In addition, when the turning scroll 9 rotates as described above and the refrigerant gas introduced into the compression pocket P is compressed, the tip scroll 22 is pivoted with the tip chamber 22 installed at the end of the wrap 8b of the fixed stroke 8. The tip chamber 22 provided at the end of the wrap 9a of the scroll 9 is operated in close contact with the arrow by the gas pressure introduced to the lower side of the tip chamber 22 as shown in FIG. 2 to prevent leakage of compressed gas. Lose.

However, the gas leakage prevention method in the conventional scroll compressor configured as described above, the tip seal method is maintained by the tip seal formed at the end of the wrap, so that the limited surface of the end of the tip seal is in close contact with each other. There was a problem that leakage occurs.

In addition, since most of the tip chamber is made of a non-ferrous material that is weak to heat, there was a problem that the internal temperature is damaged.

An object of the present invention devised in view of the above problems is to prevent the leakage of the compressed gas to be generated by rotating the front end of the end of the rotating scroll and the fixed scroll wrap in close contact during operation of the compressor. It is an object of the present invention to provide a scroll compressor in which leakage of a suitable compressed gas is prevented.

In order to achieve the object of the present invention as described above

A sealed container in which a predetermined accommodation space is formed, and in which oil is stored at the bottom of the accommodation space;

Upper and lower frames are respectively fixed to the inner upper and lower portions of the sealed container,

An electric mechanism part installed between the upper frame and the lower frame and comprising a rotor and a stator;

A rotary shaft press-fitted to the center of the rotor and rotated at the same time when the rotor is rotated,

Compressor mechanism coupled to the upper end of the rotating shaft and consisting of a fixed scroll and a rotating scroll for compressing the refrigerant;

The wrap end of the turning scroll and the fixed scroll are in close contact and compressed by using the compressed gas of the intermediate pressure chamber provided between the upper frame and the turning scroll to be formed between the fixed scroll and the turning scroll to lift the turning scroll during operation. There is provided a scroll compressor which prevents the leakage of compressed gas, comprising a rotating scroll floating means for preventing the leakage of gas.

Hereinafter, with reference to the embodiment of the accompanying drawings, the scroll compressor to prevent the leakage of the compressed gas of the present invention configured as described above in more detail as follows.

Figure 3 is a longitudinal sectional view of the scroll compressor to prevent the leakage of compressed gas according to the present invention, Figure 4 is a cross-sectional view showing a ring receiving groove is formed in the main frame in the present invention, Figure 5 is a thrust member of the present invention 6 is a cross-sectional view taken along line AA ′ of FIG. 5.

As shown in the drawing, the scroll compressor which prevents leakage of the compressed gas of the present invention has a sealed container in which a certain accommodation space 101 is provided inside and the oil 102 is stored at the bottom of the accommodation space 101 ( An upper frame 104 is fixed to an inner upper portion of the 103, and a lower frame 105 is fixed to a lower portion thereof.

In addition, between the upper frame 104 and the lower frame 105, a motor mechanism 108 including a rotor 106 and a stator 107 is provided, and a rotation shaft (at the center of the rotor 106) 109 is press-fitted.

In addition, the upper end of the rotating shaft 109 is provided with a compression mechanism (112) consisting of a fixed scroll 110 and a rotating scroll 111 for compressing the refrigerant, the fixed scroll (110) on the upper surface of the fixed scroll (110) The discharge valve 113 for blocking the reverse flow discharged through the discharge hole (110c) formed in the central portion of the 110 is provided.

In addition, a high and low pressure separator 114 is formed on the upper side of the discharge valve 113 to divide the inside of the sealed container 103 into a high pressure part HP and a low pressure part LP, and a through hole 114a is formed in the center thereof. The side surface of the sealed container 103 is provided with a height difference between the refrigerant suction pipe 115 communicating with the low pressure part LP and the refrigerant discharge pipe 116 communicating with the high pressure part HP.

In addition, the turning scroll 111 during operation using the compressed gas of the intermediate pressure portion MP formed between the upper frame 104 and the turning scroll 111 between the fixed scroll 110 and the turning scroll 111. The floating scroll floating means 120 is installed to prevent the leakage of the gas compressed by bringing the rotating scroll 111 and the ends of the wrap 110a (111a) of the fixed scroll 110 into close contact with each other.

The swing scroll floating means 120 is formed on the upper surface of the upper frame 104 of the annular ring insertion groove 121 of a predetermined width and depth, the lower side of the swing scroll 111 in the ring insertion groove 121 The upper side communicates with and forms an intermediate rolling hole 122 which communicates with the intermediate pressure part MP formed between the fixed scroll 110 and the swinging scroll 111 during operation, and is inserted into the ring insertion groove 121 and operated. An annular thrust ring 123 for floating the swinging scroll 111 by the refrigerant gas flowing into the ring insertion groove 121 through the intermediate rolling hole 122 in the intermediate pressure section MP, Is coupled to the lower side of the ring 123 is configured to install a sealing member 124 for blocking the leakage of the refrigerant gas flowing into the ring insertion groove 121.

The thrust ring 123 is formed in the upper surface of the body portion 131 of the metal material at regular intervals in the recess groove 132 of a predetermined depth, the gas inlet hole penetrating downward in the central portion of the recess groove 132 ( 133 is formed, the connection groove 134 for connecting the concave groove 132 is formed to a predetermined depth along the upper surface of the body portion 131.

The sealing member 124 is advantageously to use a rubber material to be in close contact with the side wall of the ring insertion groove 121.

In the figure, reference numeral 109a is an eccentric portion, 110b is a refrigerant inlet hole, and 117 is a sliding bush.

Referring to FIGS. 7 and 8, the operation of the scroll compressor configured as described above is applied to the rotor 106 when power is applied and the rotor 106 of the electric mechanism unit 108 rotates. The rotating shaft 109 rotates, the rotating scroll 111 coupled to the eccentric portion 109a formed at the upper end of the rotating shaft 109 rotates, and the rotating scroll 111 rotates, the rotating shaft 109 The pivoting movement is performed by using the eccentric distance, which is the distance from the center of the center to the center of the eccentric portion 109a, as the turning radius, and the turning scroll 111 is rotated by the sliding bush 117. .

When the turning scroll 111 is turned as described above, the wrap 111a engages with the wrap 110a of the fixed scroll 110 to make a pivoting motion. At this time, the refrigerant gas is sealed through the refrigerant suction pipe 115. The low pressure portion LP of the 103 flows in, and the introduced refrigerant gas flows through the refrigerant inlet hole 110b formed in the fixed scroll 110 and the wrap 110a of the fixed scroll 110 and the turning scroll 111. Flows into the compression pocket P formed between the laps 111a, and the volume of the compression pocket P is reduced by the continuous rotation of the rotating scroll 111 to compress the refrigerant gas and move to the center portion. The moved and compressed refrigerant gas is discharged through the discharge hole 110c and the discharge valve 113 of the fixed scroll 110 and then discharged to the high pressure part HP through the through hole 114a of the high and low pressure separating plate 114. Lose.

When the refrigerant gas is compressed in the compression mechanism part 112 as described above, a part of the refrigerant gas of the intermediate pressure part MP is supplied to the recessed groove 132 of the thrust ring 123 through the intermediate rolling hole 122. The refrigerant gas supplied as described above is introduced into the lower side of the sealing member 124 through the gas inlet hole 133 of the thrust ring 123 to push up the thrust ring 123 upward as shown in FIG. 8. By the movement of the thrust ring 123, the turning scroll 111 is lifted so that the ends of the wrap 111a and 110a of the turning scroll 111 and the fixed scroll 110 come into close contact with each other. Leakage is cut off.

As described above in detail, the scroll compressor in which the compressed gas of the present invention is prevented is provided with swing scroll floating means for floating the swing scroll by using the compressed gas of the intermediate pressure portion between the upper frame and the swing scroll. As the turning scroll is injured by the turning scroll floating means, and the lap of the turning scroll and the fixed scroll are rotated in close contact with the contact surface, the refrigerant gas is compressed without leakage of the compressed gas, and thus the compression efficiency of the compressor is increased. There is an effect to be improved.

Claims (4)

A sealed container in which a predetermined accommodation space is formed and oil is stored at a bottom of the accommodation space; Upper and lower frames respectively fixed to upper and lower portions of the closed container; An electric mechanism part installed between the upper frame and the lower frame and including a rotor and a stator; A rotating shaft that is pressed into the center of the rotor and rotates at the same time when the rotor is rotated; A compression mechanism unit coupled to an upper end of the rotating shaft and configured of a fixed scroll and a swing scroll for compressing a refrigerant; And The lap end of the turning scroll and the fixed scroll are in close contact and compressed by using the compressed gas of the intermediate pressure portion provided between the upper frame and the turning scroll to be formed between the fixed scroll and the turning scroll to lift the turning scroll during operation. Includes; rotating scroll floating means for preventing the leakage of gas to be The swing scroll floating means, the groove of the metal material is inserted into the ring insertion groove formed in the upper surface of the upper frame in the up and down direction, and the recess groove and the yaw of the predetermined depth at equal intervals on the upper surface of the body portion. A thrust ring having a gas inlet hole penetrating downward in a central portion of the mouth groove; And It is coupled by the lower side of the thrust ring and is driven by the refrigerant gas flowing into the ring insertion groove through the intermediate rolling hole formed in the turning scroll during operation and floating the turning scroll by floating the thrust ring to lift the turning scroll and the fixed scroll. Sealing member for rotating the wrap in close contact with the scroll compressor to prevent leakage of a compressed gas comprising a. delete The method of claim 1, wherein the thrust ring, Scroll compressor to prevent the leakage of compressed gas further comprises a connection groove formed in a predetermined depth along the upper surface of the body portion to connect the concave groove. The method of claim 1, wherein the sealing member, Scroll compressor to prevent the leakage of compressed gas which is a rubber material that can be in close contact with the inner wall of the ring insertion groove.

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